leandre Posted October 19, 2012 Report Posted October 19, 2012 so i switched my 4k motor with another 4k motor and had to switch the dizzy cause it wasnt sparking as i switched em over i didn't take notice of which way it was facing so i just threw it on. the motor wont start and its getting spark and fuel. not sure on how i could get the timing right as ive tried push starting, cranking the motor and doesnt start. if someone could guide me on how to get the timing right that would be great. Quote
altezzaclub Posted October 19, 2012 Report Posted October 19, 2012 OK- First, you need to take note of which way the dizzy turns. Then look inside the oil cap and watch the rockers to get number 1 on TDC. Cylinders 1 & 4 come up together so the crankshaft timing marks look the same for both cylinders, but obviously the dizzy has to know the difference. You can just see the number 1 inlet rocker in there and it needs to be stationary as the crank swings through the last 45deg of rotation. If it is busy closing, then keep turning another full rotation until you see it sitting there on compression stroke over that last 1/4 turn. Then you need to put the dizzy in so the points are just opening at about 5deg before TDC. They swing as the dizzy goes in, so you will have to take it out and turn it to the next tooth a couple of times until you have it right. This is why you need to know which way it rotates. Basically they number one plug lead is slightly clockwise off pointing straight to the head. Then put the crank timing marks on 10deg BTDC, turn on the ignition, and move the dizzy back and forth until the points just spark as they open & do the clamp up. It should run at that quite happily and if you want it more accurate get a timing light. Make sure the leads are in the right order for the way the dizzy turns. Id say you have it 180deg out. Quote
altezzaclub Posted October 19, 2012 Report Posted October 19, 2012 Oh- also make sure the points do spark when you open them, & check the points gap. Wrong points gap will affect performance and they wear shut, or a broken wire or poor condenser will stop it sparking well. Seeing one dizzy wasn't sparking there may be a wiring problem. Quote
leandre Posted October 20, 2012 Author Report Posted October 20, 2012 Sweet! Got it! You legend. Thanks for your help. Quote
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